SG1 gate into a enclosed room with nothing but a gate and a dhd. On walking over a circle on the floor a device emerges from a wall and Jack looks inside and promptly collapses. Upon waking he seems fine but slowly starts substituting latin sounding words for english and bit by bit his mind is over taken by the alien devices effects.
The rest you have to watch because it’s a great series arc cornerstone episode and my personal favourite of this season and pretty darn close to the best of the series.
Stephen sent us feedback, groovy (getting ready for watching 1969).